Incest - sexual relations between two closely related people - is frowned upon, but those who've actually done it have shared their incredibly revealing accounts.
One woman said she ended up fathering two children with her brother and they all live happily, while others say they've been mentally scarred by their forbidden encounters.
We can’t rely on repugnance to justify our social policies, since our repugnance is simply that: our own.
Besides which, people are repulsed by different things – and we cannot leave it up to the whims of our emotions to implement policies and laws which could, unnecessarily, cause suffering to other people, as is the case with gay people, women, and indeed the current brother-and-sister couple.
For example, there is no good reason to justify the oppression of gay people or women – though there are plenty of reasons people do.
Thus because there are no good arguments to support oppressing gay people, the idea should be discarded and indeed opposed where it arises.
Good Thirdly, and oddly, people exclaim it’s “just” repugnant. Nonetheless, why should the sexual activities of two consenting adults concern us?
This is the same question we can ask those who are ‘against’ homosexuality (which is like being against having blue eyes).
The philosopher Julian Baggini has correctly said that something being natural tells us no more about its moral property than if you said something was red.
"It took over 10 years for me to finally go to him and ask for forgiveness, and to my surprise he wasn't mad at all.
It was a huge relief, and he and I aren't awkward around each other anymore." One man said he had sex with his sister when he was 17 and she was 14, and immediately felt scared, ashamed and confused.
They ended up with an "incredibly religious and overprotective" couple who homeschooled them and rarely let them leave the house.
"Both he and I went for months without any sexual release and barely any contact with the opposite sex outside of each other," she wrote, recalling when she was 15 and her brother was 14.